45 Castle Street

45 Castle Street is an early 19th-century townhouse that has been converted into offices as of 2023.

The building is constructed of red and silver-grey bricks arranged in Flemish bond, with brick and painted render at the rear. It features three storeys and three bays facing Castle Street, topped with a pitched roof. There are two and three-storey extensions at the back, built in at least three phases. The former garden area has been developed into a car park along with neighbouring plots.

The front elevation showcases decorative brickwork with burnt headers and red stretchers. The ground floor has been rebuilt and altered, featuring three round-arched openings with fanlights. The westernmost opening contains a six-panelled door, while the two eastern openings have fixed, nine-pane windows. Between these are two six-over-six sash windows with flat gauged-brick arches.

On the first and second floors, each has three windows beneath flat gauged-brick arches. The first-floor windows are six-over-six sashes, whereas the second-floor windows, which likely were originally three-over-three sashes, have been replaced with 20th and 21st-century six-pane casements. A brick dentil course runs beneath the shallow projecting eaves.

At the rear, the original building is largely hidden by later extensions of varying styles and dates, made of brick and rendered brick, featuring windows of different designs. One of these extensions includes a piece of heavily weathered stonework with quatrefoils, set into the brickwork.